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fs/jfs/namei.c
36.9 KB
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/* * Copyright (C) International Business Machines Corp., 2000-2004 * Portions Copyright (C) Christoph Hellwig, 2001-2002 * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See * the GNU General Public License for more details. * * You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include <linux/fs.h> #include <linux/ctype.h> #include <linux/quotaops.h> #include "jfs_incore.h" #include "jfs_superblock.h" #include "jfs_inode.h" #include "jfs_dinode.h" #include "jfs_dmap.h" #include "jfs_unicode.h" #include "jfs_metapage.h" #include "jfs_xattr.h" #include "jfs_acl.h" #include "jfs_debug.h" |
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/* * forward references */ |
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struct dentry_operations jfs_ci_dentry_operations; static s64 commitZeroLink(tid_t, struct inode *); /* |
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* NAME: free_ea_wmap(inode) * |
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* FUNCTION: free uncommitted extended attributes from working map |
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* */ static inline void free_ea_wmap(struct inode *inode) { dxd_t *ea = &JFS_IP(inode)->ea; if (ea->flag & DXD_EXTENT) { /* free EA pages from cache */ invalidate_dxd_metapages(inode, *ea); dbFree(inode, addressDXD(ea), lengthDXD(ea)); } ea->flag = 0; } /* |
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* NAME: jfs_create(dip, dentry, mode) * * FUNCTION: create a regular file in the parent directory <dip> * with name = <from dentry> and mode = <mode> * |
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* PARAMETER: dip - parent directory vnode |
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* dentry - dentry of new file * mode - create mode (rwxrwxrwx). * nd- nd struct * * RETURN: Errors from subroutines * */ static int jfs_create(struct inode *dip, struct dentry *dentry, int mode, struct nameidata *nd) { int rc = 0; tid_t tid; /* transaction id */ struct inode *ip = NULL; /* child directory inode */ ino_t ino; struct component_name dname; /* child directory name */ struct btstack btstack; struct inode *iplist[2]; struct tblock *tblk; jfs_info("jfs_create: dip:0x%p name:%s", dip, dentry->d_name.name); /* * search parent directory for entry/freespace * (dtSearch() returns parent directory page pinned) */ if ((rc = get_UCSname(&dname, dentry))) goto out1; /* * Either iAlloc() or txBegin() may block. Deadlock can occur if we * block there while holding dtree page, so we allocate the inode & * begin the transaction before we search the directory. */ ip = ialloc(dip, mode); |
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if (IS_ERR(ip)) { rc = PTR_ERR(ip); |
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goto out2; } tid = txBegin(dip->i_sb, 0); |
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mutex_lock_nested(&JFS_IP(dip)->commit_mutex, COMMIT_MUTEX_PARENT); mutex_lock_nested(&JFS_IP(ip)->commit_mutex, COMMIT_MUTEX_CHILD); |
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rc = jfs_init_acl(tid, ip, dip); if (rc) goto out3; |
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rc = jfs_init_security(tid, ip, dip); if (rc) { txAbort(tid, 0); goto out3; } |
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if ((rc = dtSearch(dip, &dname, &ino, &btstack, JFS_CREATE))) { jfs_err("jfs_create: dtSearch returned %d", rc); |
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txAbort(tid, 0); |
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goto out3; } tblk = tid_to_tblock(tid); tblk->xflag |= COMMIT_CREATE; tblk->ino = ip->i_ino; tblk->u.ixpxd = JFS_IP(ip)->ixpxd; iplist[0] = dip; iplist[1] = ip; /* * initialize the child XAD tree root in-line in inode */ xtInitRoot(tid, ip); /* * create entry in parent directory for child directory * (dtInsert() releases parent directory page) */ ino = ip->i_ino; if ((rc = dtInsert(tid, dip, &dname, &ino, &btstack))) { if (rc == -EIO) { jfs_err("jfs_create: dtInsert returned -EIO"); txAbort(tid, 1); /* Marks Filesystem dirty */ } else txAbort(tid, 0); /* Filesystem full */ goto out3; } ip->i_op = &jfs_file_inode_operations; ip->i_fop = &jfs_file_operations; ip->i_mapping->a_ops = &jfs_aops; insert_inode_hash(ip); mark_inode_dirty(ip); dip->i_ctime = dip->i_mtime = CURRENT_TIME; mark_inode_dirty(dip); rc = txCommit(tid, 2, &iplist[0], 0); out3: txEnd(tid); |
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mutex_unlock(&JFS_IP(ip)->commit_mutex); |
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mutex_unlock(&JFS_IP(dip)->commit_mutex); |
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if (rc) { |
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free_ea_wmap(ip); |
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ip->i_nlink = 0; iput(ip); } else d_instantiate(dentry, ip); out2: free_UCSname(&dname); |
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out1: jfs_info("jfs_create: rc:%d", rc); return rc; } /* * NAME: jfs_mkdir(dip, dentry, mode) * * FUNCTION: create a child directory in the parent directory <dip> * with name = <from dentry> and mode = <mode> * |
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* PARAMETER: dip - parent directory vnode |
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* dentry - dentry of child directory * mode - create mode (rwxrwxrwx). * * RETURN: Errors from subroutines * * note: * EACCESS: user needs search+write permission on the parent directory */ static int jfs_mkdir(struct inode *dip, struct dentry *dentry, int mode) { int rc = 0; tid_t tid; /* transaction id */ struct inode *ip = NULL; /* child directory inode */ ino_t ino; struct component_name dname; /* child directory name */ struct btstack btstack; struct inode *iplist[2]; struct tblock *tblk; jfs_info("jfs_mkdir: dip:0x%p name:%s", dip, dentry->d_name.name); /* link count overflow on parent directory ? */ if (dip->i_nlink == JFS_LINK_MAX) { rc = -EMLINK; goto out1; } /* * search parent directory for entry/freespace * (dtSearch() returns parent directory page pinned) */ if ((rc = get_UCSname(&dname, dentry))) goto out1; /* * Either iAlloc() or txBegin() may block. Deadlock can occur if we * block there while holding dtree page, so we allocate the inode & * begin the transaction before we search the directory. */ ip = ialloc(dip, S_IFDIR | mode); |
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if (IS_ERR(ip)) { rc = PTR_ERR(ip); |
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goto out2; } tid = txBegin(dip->i_sb, 0); |
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mutex_lock_nested(&JFS_IP(dip)->commit_mutex, COMMIT_MUTEX_PARENT); mutex_lock_nested(&JFS_IP(ip)->commit_mutex, COMMIT_MUTEX_CHILD); |
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rc = jfs_init_acl(tid, ip, dip); if (rc) goto out3; |
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rc = jfs_init_security(tid, ip, dip); if (rc) { txAbort(tid, 0); goto out3; } |
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if ((rc = dtSearch(dip, &dname, &ino, &btstack, JFS_CREATE))) { jfs_err("jfs_mkdir: dtSearch returned %d", rc); |
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txAbort(tid, 0); |
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goto out3; } tblk = tid_to_tblock(tid); tblk->xflag |= COMMIT_CREATE; tblk->ino = ip->i_ino; tblk->u.ixpxd = JFS_IP(ip)->ixpxd; iplist[0] = dip; iplist[1] = ip; /* * initialize the child directory in-line in inode */ dtInitRoot(tid, ip, dip->i_ino); /* * create entry in parent directory for child directory * (dtInsert() releases parent directory page) */ ino = ip->i_ino; if ((rc = dtInsert(tid, dip, &dname, &ino, &btstack))) { if (rc == -EIO) { jfs_err("jfs_mkdir: dtInsert returned -EIO"); txAbort(tid, 1); /* Marks Filesystem dirty */ } else txAbort(tid, 0); /* Filesystem full */ goto out3; } ip->i_nlink = 2; /* for '.' */ ip->i_op = &jfs_dir_inode_operations; ip->i_fop = &jfs_dir_operations; insert_inode_hash(ip); mark_inode_dirty(ip); /* update parent directory inode */ |
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inc_nlink(dip); /* for '..' from child directory */ |
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dip->i_ctime = dip->i_mtime = CURRENT_TIME; mark_inode_dirty(dip); rc = txCommit(tid, 2, &iplist[0], 0); out3: txEnd(tid); |
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mutex_unlock(&JFS_IP(ip)->commit_mutex); |
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mutex_unlock(&JFS_IP(dip)->commit_mutex); |
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if (rc) { |
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free_ea_wmap(ip); |
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ip->i_nlink = 0; iput(ip); } else d_instantiate(dentry, ip); out2: free_UCSname(&dname); |
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out1: jfs_info("jfs_mkdir: rc:%d", rc); return rc; } /* * NAME: jfs_rmdir(dip, dentry) * * FUNCTION: remove a link to child directory * |
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* PARAMETER: dip - parent inode |
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* dentry - child directory dentry * * RETURN: -EINVAL - if name is . or .. |
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* -EINVAL - if . or .. exist but are invalid. |
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* errors from subroutines * * note: |
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* if other threads have the directory open when the last link * is removed, the "." and ".." entries, if present, are removed before * rmdir() returns and no new entries may be created in the directory, * but the directory is not removed until the last reference to |
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* the directory is released (cf.unlink() of regular file). */ static int jfs_rmdir(struct inode *dip, struct dentry *dentry) { int rc; tid_t tid; /* transaction id */ struct inode *ip = dentry->d_inode; ino_t ino; struct component_name dname; struct inode *iplist[2]; struct tblock *tblk; jfs_info("jfs_rmdir: dip:0x%p name:%s", dip, dentry->d_name.name); /* Init inode for quota operations. */ DQUOT_INIT(ip); /* directory must be empty to be removed */ if (!dtEmpty(ip)) { rc = -ENOTEMPTY; goto out; } if ((rc = get_UCSname(&dname, dentry))) { goto out; } tid = txBegin(dip->i_sb, 0); |
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mutex_lock_nested(&JFS_IP(dip)->commit_mutex, COMMIT_MUTEX_PARENT); mutex_lock_nested(&JFS_IP(ip)->commit_mutex, COMMIT_MUTEX_CHILD); |
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iplist[0] = dip; iplist[1] = ip; tblk = tid_to_tblock(tid); tblk->xflag |= COMMIT_DELETE; tblk->u.ip = ip; /* * delete the entry of target directory from parent directory */ ino = ip->i_ino; if ((rc = dtDelete(tid, dip, &dname, &ino, JFS_REMOVE))) { jfs_err("jfs_rmdir: dtDelete returned %d", rc); if (rc == -EIO) txAbort(tid, 1); txEnd(tid); |
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mutex_unlock(&JFS_IP(ip)->commit_mutex); |
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mutex_unlock(&JFS_IP(dip)->commit_mutex); |
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goto out2; } /* update parent directory's link count corresponding * to ".." entry of the target directory deleted */ |
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dip->i_ctime = dip->i_mtime = CURRENT_TIME; |
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inode_dec_link_count(dip); |
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/* * OS/2 could have created EA and/or ACL */ /* free EA from both persistent and working map */ if (JFS_IP(ip)->ea.flag & DXD_EXTENT) { /* free EA pages */ txEA(tid, ip, &JFS_IP(ip)->ea, NULL); } JFS_IP(ip)->ea.flag = 0; /* free ACL from both persistent and working map */ if (JFS_IP(ip)->acl.flag & DXD_EXTENT) { /* free ACL pages */ txEA(tid, ip, &JFS_IP(ip)->acl, NULL); } JFS_IP(ip)->acl.flag = 0; /* mark the target directory as deleted */ |
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clear_nlink(ip); |
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mark_inode_dirty(ip); rc = txCommit(tid, 2, &iplist[0], 0); txEnd(tid); |
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mutex_unlock(&JFS_IP(ip)->commit_mutex); |
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mutex_unlock(&JFS_IP(dip)->commit_mutex); |
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/* * Truncating the directory index table is not guaranteed. It * may need to be done iteratively */ if (test_cflag(COMMIT_Stale, dip)) { if (dip->i_size > 1) jfs_truncate_nolock(dip, 0); clear_cflag(COMMIT_Stale, dip); } out2: free_UCSname(&dname); out: jfs_info("jfs_rmdir: rc:%d", rc); return rc; } /* * NAME: jfs_unlink(dip, dentry) * |
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* FUNCTION: remove a link to object <vp> named by <name> |
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* from parent directory <dvp> * |
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* PARAMETER: dip - inode of parent directory * dentry - dentry of object to be removed |
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* * RETURN: errors from subroutines * * note: * temporary file: if one or more processes have the file open * when the last link is removed, the link will be removed before * unlink() returns, but the removal of the file contents will be * postponed until all references to the files are closed. * * JFS does NOT support unlink() on directories. * */ static int jfs_unlink(struct inode *dip, struct dentry *dentry) { int rc; tid_t tid; /* transaction id */ struct inode *ip = dentry->d_inode; ino_t ino; struct component_name dname; /* object name */ struct inode *iplist[2]; struct tblock *tblk; s64 new_size = 0; int commit_flag; jfs_info("jfs_unlink: dip:0x%p name:%s", dip, dentry->d_name.name); /* Init inode for quota operations. */ DQUOT_INIT(ip); if ((rc = get_UCSname(&dname, dentry))) goto out; |
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IWRITE_LOCK(ip, RDWRLOCK_NORMAL); |
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tid = txBegin(dip->i_sb, 0); |
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mutex_lock_nested(&JFS_IP(dip)->commit_mutex, COMMIT_MUTEX_PARENT); mutex_lock_nested(&JFS_IP(ip)->commit_mutex, COMMIT_MUTEX_CHILD); |
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iplist[0] = dip; iplist[1] = ip; /* * delete the entry of target file from parent directory */ ino = ip->i_ino; if ((rc = dtDelete(tid, dip, &dname, &ino, JFS_REMOVE))) { jfs_err("jfs_unlink: dtDelete returned %d", rc); if (rc == -EIO) txAbort(tid, 1); /* Marks FS Dirty */ txEnd(tid); |
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mutex_unlock(&JFS_IP(ip)->commit_mutex); |
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mutex_unlock(&JFS_IP(dip)->commit_mutex); |
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IWRITE_UNLOCK(ip); goto out1; } ASSERT(ip->i_nlink); ip->i_ctime = dip->i_ctime = dip->i_mtime = CURRENT_TIME; mark_inode_dirty(dip); /* update target's inode */ |
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inode_dec_link_count(ip); |
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/* |
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* commit zero link count object |
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*/ if (ip->i_nlink == 0) { assert(!test_cflag(COMMIT_Nolink, ip)); /* free block resources */ if ((new_size = commitZeroLink(tid, ip)) < 0) { txAbort(tid, 1); /* Marks FS Dirty */ txEnd(tid); |
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mutex_unlock(&JFS_IP(ip)->commit_mutex); |
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mutex_unlock(&JFS_IP(dip)->commit_mutex); |
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IWRITE_UNLOCK(ip); rc = new_size; goto out1; } tblk = tid_to_tblock(tid); tblk->xflag |= COMMIT_DELETE; tblk->u.ip = ip; } /* * Incomplete truncate of file data can * result in timing problems unless we synchronously commit the * transaction. */ if (new_size) commit_flag = COMMIT_SYNC; else commit_flag = 0; /* * If xtTruncate was incomplete, commit synchronously to avoid * timing complications */ rc = txCommit(tid, 2, &iplist[0], commit_flag); txEnd(tid); |
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mutex_unlock(&JFS_IP(ip)->commit_mutex); |
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mutex_unlock(&JFS_IP(dip)->commit_mutex); |
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while (new_size && (rc == 0)) { tid = txBegin(dip->i_sb, 0); |
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mutex_lock(&JFS_IP(ip)->commit_mutex); |
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new_size = xtTruncate_pmap(tid, ip, new_size); if (new_size < 0) { txAbort(tid, 1); /* Marks FS Dirty */ rc = new_size; } else rc = txCommit(tid, 2, &iplist[0], COMMIT_SYNC); txEnd(tid); |
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mutex_unlock(&JFS_IP(ip)->commit_mutex); |
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} if (ip->i_nlink == 0) set_cflag(COMMIT_Nolink, ip); IWRITE_UNLOCK(ip); /* * Truncating the directory index table is not guaranteed. It * may need to be done iteratively */ if (test_cflag(COMMIT_Stale, dip)) { if (dip->i_size > 1) jfs_truncate_nolock(dip, 0); clear_cflag(COMMIT_Stale, dip); } out1: free_UCSname(&dname); out: jfs_info("jfs_unlink: rc:%d", rc); return rc; } /* * NAME: commitZeroLink() * |
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* FUNCTION: for non-directory, called by jfs_remove(), |
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* truncate a regular file, directory or symbolic |
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* link to zero length. return 0 if type is not |
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* one of these. * * if the file is currently associated with a VM segment * only permanent disk and inode map resources are freed, * and neither the inode nor indirect blocks are modified * so that the resources can be later freed in the work * map by ctrunc1. * if there is no VM segment on entry, the resources are * freed in both work and permanent map. |
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* (? for temporary file - memory object is cached even |
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* after no reference: * reference count > 0 - ) * * PARAMETERS: cd - pointer to commit data structure. * current inode is the one to truncate. * * RETURN: Errors from subroutines */ static s64 commitZeroLink(tid_t tid, struct inode *ip) { int filetype; struct tblock *tblk; jfs_info("commitZeroLink: tid = %d, ip = 0x%p", tid, ip); filetype = ip->i_mode & S_IFMT; switch (filetype) { case S_IFREG: break; case S_IFLNK: /* fast symbolic link */ if (ip->i_size < IDATASIZE) { ip->i_size = 0; return 0; } break; default: assert(filetype != S_IFDIR); return 0; } set_cflag(COMMIT_Freewmap, ip); /* mark transaction of block map update type */ tblk = tid_to_tblock(tid); tblk->xflag |= COMMIT_PMAP; /* * free EA */ if (JFS_IP(ip)->ea.flag & DXD_EXTENT) /* acquire maplock on EA to be freed from block map */ txEA(tid, ip, &JFS_IP(ip)->ea, NULL); /* * free ACL */ if (JFS_IP(ip)->acl.flag & DXD_EXTENT) /* acquire maplock on EA to be freed from block map */ txEA(tid, ip, &JFS_IP(ip)->acl, NULL); /* * free xtree/data (truncate to zero length): |
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* free xtree/data pages from cache if COMMIT_PWMAP, |
1da177e4c Linux-2.6.12-rc2 |
652 653 654 655 656 657 658 659 660 661 662 |
* free xtree/data blocks from persistent block map, and * free xtree/data blocks from working block map if COMMIT_PWMAP; */ if (ip->i_size) return xtTruncate_pmap(tid, ip, 0); return 0; } /* |
1868f4aa5 JFS: fix sparse w... |
663 |
* NAME: jfs_free_zero_link() |
1da177e4c Linux-2.6.12-rc2 |
664 |
* |
f720e3ba5 JFS: Whitespace c... |
665 |
* FUNCTION: for non-directory, called by iClose(), |
63f83c9fc JFS: White space ... |
666 |
* free resources of a file from cache and WORKING map |
1da177e4c Linux-2.6.12-rc2 |
667 668 669 670 |
* for a file previously committed with zero link count * while associated with a pager object, * * PARAMETER: ip - pointer to inode of file. |
1da177e4c Linux-2.6.12-rc2 |
671 |
*/ |
1868f4aa5 JFS: fix sparse w... |
672 |
void jfs_free_zero_link(struct inode *ip) |
1da177e4c Linux-2.6.12-rc2 |
673 |
{ |
1da177e4c Linux-2.6.12-rc2 |
674 |
int type; |
1868f4aa5 JFS: fix sparse w... |
675 |
jfs_info("jfs_free_zero_link: ip = 0x%p", ip); |
1da177e4c Linux-2.6.12-rc2 |
676 677 678 679 680 681 682 683 684 685 686 687 |
/* return if not reg or symbolic link or if size is * already ok. */ type = ip->i_mode & S_IFMT; switch (type) { case S_IFREG: break; case S_IFLNK: /* if its contained in inode nothing to do */ if (ip->i_size < IDATASIZE) |
1868f4aa5 JFS: fix sparse w... |
688 |
return; |
1da177e4c Linux-2.6.12-rc2 |
689 690 |
break; default: |
1868f4aa5 JFS: fix sparse w... |
691 |
return; |
1da177e4c Linux-2.6.12-rc2 |
692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 |
} /* * free EA */ if (JFS_IP(ip)->ea.flag & DXD_EXTENT) { s64 xaddr = addressDXD(&JFS_IP(ip)->ea); int xlen = lengthDXD(&JFS_IP(ip)->ea); struct maplock maplock; /* maplock for COMMIT_WMAP */ struct pxd_lock *pxdlock; /* maplock for COMMIT_WMAP */ /* free EA pages from cache */ invalidate_dxd_metapages(ip, JFS_IP(ip)->ea); /* free EA extent from working block map */ maplock.index = 1; pxdlock = (struct pxd_lock *) & maplock; pxdlock->flag = mlckFREEPXD; PXDaddress(&pxdlock->pxd, xaddr); PXDlength(&pxdlock->pxd, xlen); txFreeMap(ip, pxdlock, NULL, COMMIT_WMAP); } /* * free ACL */ if (JFS_IP(ip)->acl.flag & DXD_EXTENT) { s64 xaddr = addressDXD(&JFS_IP(ip)->acl); int xlen = lengthDXD(&JFS_IP(ip)->acl); struct maplock maplock; /* maplock for COMMIT_WMAP */ struct pxd_lock *pxdlock; /* maplock for COMMIT_WMAP */ invalidate_dxd_metapages(ip, JFS_IP(ip)->acl); /* free ACL extent from working block map */ maplock.index = 1; pxdlock = (struct pxd_lock *) & maplock; pxdlock->flag = mlckFREEPXD; PXDaddress(&pxdlock->pxd, xaddr); PXDlength(&pxdlock->pxd, xlen); txFreeMap(ip, pxdlock, NULL, COMMIT_WMAP); } /* * free xtree/data (truncate to zero length): * free xtree/data pages from cache, and * free xtree/data blocks from working block map; */ if (ip->i_size) |
1868f4aa5 JFS: fix sparse w... |
741 |
xtTruncate(0, ip, 0, COMMIT_WMAP); |
1da177e4c Linux-2.6.12-rc2 |
742 743 744 745 746 747 748 749 |
} /* * NAME: jfs_link(vp, dvp, name, crp) * * FUNCTION: create a link to <vp> by the name = <name> * in the parent directory <dvp> * |
63f83c9fc JFS: White space ... |
750 |
* PARAMETER: vp - target object |
1da177e4c Linux-2.6.12-rc2 |
751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 |
* dvp - parent directory of new link * name - name of new link to target object * crp - credential * * RETURN: Errors from subroutines * * note: * JFS does NOT support link() on directories (to prevent circular * path in the directory hierarchy); * EPERM: the target object is a directory, and either the caller * does not have appropriate privileges or the implementation prohibits * using link() on directories [XPG4.2]. * * JFS does NOT support links between file systems: * EXDEV: target object and new link are on different file systems and * implementation does not support links between file systems [XPG4.2]. */ static int jfs_link(struct dentry *old_dentry, struct inode *dir, struct dentry *dentry) { int rc; tid_t tid; struct inode *ip = old_dentry->d_inode; ino_t ino; struct component_name dname; struct btstack btstack; struct inode *iplist[2]; jfs_info("jfs_link: %s %s", old_dentry->d_name.name, dentry->d_name.name); if (ip->i_nlink == JFS_LINK_MAX) return -EMLINK; if (ip->i_nlink == 0) return -ENOENT; tid = txBegin(ip->i_sb, 0); |
82d5b9a7c JFS: Add lockdep ... |
789 790 |
mutex_lock_nested(&JFS_IP(dir)->commit_mutex, COMMIT_MUTEX_PARENT); mutex_lock_nested(&JFS_IP(ip)->commit_mutex, COMMIT_MUTEX_CHILD); |
1da177e4c Linux-2.6.12-rc2 |
791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 |
/* * scan parent directory for entry/freespace */ if ((rc = get_UCSname(&dname, dentry))) goto out; if ((rc = dtSearch(dir, &dname, &ino, &btstack, JFS_CREATE))) goto free_dname; /* * create entry for new link in parent directory */ ino = ip->i_ino; if ((rc = dtInsert(tid, dir, &dname, &ino, &btstack))) goto free_dname; /* update object inode */ |
d8c76e6f4 [PATCH] r/o bind ... |
809 |
inc_nlink(ip); /* for new link */ |
1da177e4c Linux-2.6.12-rc2 |
810 |
ip->i_ctime = CURRENT_TIME; |
988a6490a JFS: set i_ctime ... |
811 |
dir->i_ctime = dir->i_mtime = CURRENT_TIME; |
1da177e4c Linux-2.6.12-rc2 |
812 813 814 815 816 817 818 819 |
mark_inode_dirty(dir); atomic_inc(&ip->i_count); iplist[0] = ip; iplist[1] = dir; rc = txCommit(tid, 2, &iplist[0], 0); if (rc) { |
9a53c3a78 [PATCH] r/o bind ... |
820 |
ip->i_nlink--; /* never instantiated */ |
1da177e4c Linux-2.6.12-rc2 |
821 822 823 824 825 826 827 828 829 |
iput(ip); } else d_instantiate(dentry, ip); free_dname: free_UCSname(&dname); out: txEnd(tid); |
1de87444f JFS: semaphore to... |
830 |
mutex_unlock(&JFS_IP(ip)->commit_mutex); |
48ce8b056 JFS: commit_mutex... |
831 |
mutex_unlock(&JFS_IP(dir)->commit_mutex); |
1da177e4c Linux-2.6.12-rc2 |
832 833 834 835 836 837 838 839 840 |
jfs_info("jfs_link: rc:%d", rc); return rc; } /* * NAME: jfs_symlink(dip, dentry, name) * * FUNCTION: creates a symbolic link to <symlink> by name <name> |
f720e3ba5 JFS: Whitespace c... |
841 |
* in directory <dip> |
1da177e4c Linux-2.6.12-rc2 |
842 |
* |
f720e3ba5 JFS: Whitespace c... |
843 844 845 846 |
* PARAMETER: dip - parent directory vnode * dentry - dentry of symbolic link * name - the path name of the existing object * that will be the source of the link |
1da177e4c Linux-2.6.12-rc2 |
847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 |
* * RETURN: errors from subroutines * * note: * ENAMETOOLONG: pathname resolution of a symbolic link produced * an intermediate result whose length exceeds PATH_MAX [XPG4.2] */ static int jfs_symlink(struct inode *dip, struct dentry *dentry, const char *name) { int rc; tid_t tid; ino_t ino = 0; struct component_name dname; int ssize; /* source pathname size */ struct btstack btstack; struct inode *ip = dentry->d_inode; unchar *i_fastsymlink; s64 xlen = 0; int bmask = 0, xsize; s64 extent = 0, xaddr; struct metapage *mp; struct super_block *sb; struct tblock *tblk; struct inode *iplist[2]; jfs_info("jfs_symlink: dip:0x%p name:%s", dip, name); ssize = strlen(name) + 1; /* * search parent directory for entry/freespace * (dtSearch() returns parent directory page pinned) */ if ((rc = get_UCSname(&dname, dentry))) goto out1; /* * allocate on-disk/in-memory inode for symbolic link: * (iAlloc() returns new, locked inode) */ ip = ialloc(dip, S_IFLNK | 0777); |
087387f90 [PATCH] JFS: retu... |
892 893 |
if (IS_ERR(ip)) { rc = PTR_ERR(ip); |
1da177e4c Linux-2.6.12-rc2 |
894 895 896 897 |
goto out2; } tid = txBegin(dip->i_sb, 0); |
82d5b9a7c JFS: Add lockdep ... |
898 899 |
mutex_lock_nested(&JFS_IP(dip)->commit_mutex, COMMIT_MUTEX_PARENT); mutex_lock_nested(&JFS_IP(ip)->commit_mutex, COMMIT_MUTEX_CHILD); |
1da177e4c Linux-2.6.12-rc2 |
900 |
|
1d15b10f9 JFS: Implement jf... |
901 902 903 |
rc = jfs_init_security(tid, ip, dip); if (rc) goto out3; |
1da177e4c Linux-2.6.12-rc2 |
904 905 906 907 908 909 |
tblk = tid_to_tblock(tid); tblk->xflag |= COMMIT_CREATE; tblk->ino = ip->i_ino; tblk->u.ixpxd = JFS_IP(ip)->ixpxd; /* fix symlink access permission |
63f83c9fc JFS: White space ... |
910 |
* (dir_create() ANDs in the u.u_cmask, |
1da177e4c Linux-2.6.12-rc2 |
911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 |
* but symlinks really need to be 777 access) */ ip->i_mode |= 0777; /* * write symbolic link target path name */ xtInitRoot(tid, ip); /* * write source path name inline in on-disk inode (fast symbolic link) */ if (ssize <= IDATASIZE) { ip->i_op = &jfs_symlink_inode_operations; i_fastsymlink = JFS_IP(ip)->i_inline; memcpy(i_fastsymlink, name, ssize); ip->i_size = ssize - 1; /* * if symlink is > 128 bytes, we don't have the space to * store inline extended attributes */ if (ssize > sizeof (JFS_IP(ip)->i_inline)) JFS_IP(ip)->mode2 &= ~INLINEEA; jfs_info("jfs_symlink: fast symlink added ssize:%d name:%s ", ssize, name); } /* * write source path name in a single extent */ else { jfs_info("jfs_symlink: allocate extent ip:0x%p", ip); ip->i_op = &page_symlink_inode_operations; ip->i_mapping->a_ops = &jfs_aops; /* |
63f83c9fc JFS: White space ... |
951 |
* even though the data of symlink object (source |
1da177e4c Linux-2.6.12-rc2 |
952 953 954 955 956 957 958 959 960 961 |
* path name) is treated as non-journaled user data, * it is read/written thru buffer cache for performance. */ sb = ip->i_sb; bmask = JFS_SBI(sb)->bsize - 1; xsize = (ssize + bmask) & ~bmask; xaddr = 0; xlen = xsize >> JFS_SBI(sb)->l2bsize; if ((rc = xtInsert(tid, ip, 0, 0, xlen, &xaddr, 0))) { txAbort(tid, 0); |
1da177e4c Linux-2.6.12-rc2 |
962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 |
goto out3; } extent = xaddr; ip->i_size = ssize - 1; while (ssize) { /* This is kind of silly since PATH_MAX == 4K */ int copy_size = min(ssize, PSIZE); mp = get_metapage(ip, xaddr, PSIZE, 1); if (mp == NULL) { xtTruncate(tid, ip, 0, COMMIT_PWMAP); rc = -EIO; txAbort(tid, 0); goto out3; } memcpy(mp->data, name, copy_size); flush_metapage(mp); ssize -= copy_size; name += copy_size; xaddr += JFS_SBI(sb)->nbperpage; } } /* * create entry for symbolic link in parent directory */ rc = dtSearch(dip, &dname, &ino, &btstack, JFS_CREATE); if (rc == 0) { ino = ip->i_ino; rc = dtInsert(tid, dip, &dname, &ino, &btstack); } if (rc) { if (xlen) xtTruncate(tid, ip, 0, COMMIT_PWMAP); txAbort(tid, 0); /* discard new inode */ goto out3; } insert_inode_hash(ip); mark_inode_dirty(ip); |
988a6490a JFS: set i_ctime ... |
1004 1005 |
dip->i_ctime = dip->i_mtime = CURRENT_TIME; mark_inode_dirty(dip); |
1da177e4c Linux-2.6.12-rc2 |
1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 |
/* * commit update of parent directory and link object */ iplist[0] = dip; iplist[1] = ip; rc = txCommit(tid, 2, &iplist[0], 0); out3: txEnd(tid); |
1de87444f JFS: semaphore to... |
1016 |
mutex_unlock(&JFS_IP(ip)->commit_mutex); |
48ce8b056 JFS: commit_mutex... |
1017 |
mutex_unlock(&JFS_IP(dip)->commit_mutex); |
1da177e4c Linux-2.6.12-rc2 |
1018 |
if (rc) { |
4f4b401bf JFS: allow extend... |
1019 |
free_ea_wmap(ip); |
1da177e4c Linux-2.6.12-rc2 |
1020 1021 1022 1023 1024 1025 1026 |
ip->i_nlink = 0; iput(ip); } else d_instantiate(dentry, ip); out2: free_UCSname(&dname); |
1da177e4c Linux-2.6.12-rc2 |
1027 1028 1029 1030 1031 1032 1033 |
out1: jfs_info("jfs_symlink: rc:%d", rc); return rc; } /* |
f720e3ba5 JFS: Whitespace c... |
1034 |
* NAME: jfs_rename |
1da177e4c Linux-2.6.12-rc2 |
1035 |
* |
f720e3ba5 JFS: Whitespace c... |
1036 |
* FUNCTION: rename a file or directory |
1da177e4c Linux-2.6.12-rc2 |
1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 |
*/ static int jfs_rename(struct inode *old_dir, struct dentry *old_dentry, struct inode *new_dir, struct dentry *new_dentry) { struct btstack btstack; ino_t ino; struct component_name new_dname; struct inode *new_ip; struct component_name old_dname; struct inode *old_ip; int rc; tid_t tid; struct tlock *tlck; struct dt_lock *dtlck; struct lv *lv; int ipcount; struct inode *iplist[4]; struct tblock *tblk; s64 new_size = 0; int commit_flag; jfs_info("jfs_rename: %s %s", old_dentry->d_name.name, new_dentry->d_name.name); old_ip = old_dentry->d_inode; new_ip = new_dentry->d_inode; if ((rc = get_UCSname(&old_dname, old_dentry))) goto out1; if ((rc = get_UCSname(&new_dname, new_dentry))) goto out2; /* * Make sure source inode number is what we think it is */ rc = dtSearch(old_dir, &old_dname, &ino, &btstack, JFS_LOOKUP); if (rc || (ino != old_ip->i_ino)) { rc = -ENOENT; goto out3; } /* * Make sure dest inode number (if any) is what we think it is */ rc = dtSearch(new_dir, &new_dname, &ino, &btstack, JFS_LOOKUP); if (rc == 0) { if ((new_ip == 0) || (ino != new_ip->i_ino)) { rc = -ESTALE; goto out3; } } else if (rc != -ENOENT) goto out3; else if (new_ip) { /* no entry exists, but one was expected */ rc = -ESTALE; goto out3; } if (S_ISDIR(old_ip->i_mode)) { if (new_ip) { if (!dtEmpty(new_ip)) { rc = -ENOTEMPTY; goto out3; } } else if ((new_dir != old_dir) && (new_dir->i_nlink == JFS_LINK_MAX)) { rc = -EMLINK; goto out3; } } else if (new_ip) { |
82d5b9a7c JFS: Add lockdep ... |
1109 |
IWRITE_LOCK(new_ip, RDWRLOCK_NORMAL); |
1da177e4c Linux-2.6.12-rc2 |
1110 1111 1112 1113 1114 1115 1116 1117 |
/* Init inode for quota operations. */ DQUOT_INIT(new_ip); } /* * The real work starts here */ tid = txBegin(new_dir->i_sb, 0); |
82d5b9a7c JFS: Add lockdep ... |
1118 1119 1120 1121 1122 1123 1124 1125 |
/* * How do we know the locking is safe from deadlocks? * The vfs does the hard part for us. Any time we are taking nested * commit_mutexes, the vfs already has i_mutex held on the parent. * Here, the vfs has already taken i_mutex on both old_dir and new_dir. */ mutex_lock_nested(&JFS_IP(new_dir)->commit_mutex, COMMIT_MUTEX_PARENT); mutex_lock_nested(&JFS_IP(old_ip)->commit_mutex, COMMIT_MUTEX_CHILD); |
1da177e4c Linux-2.6.12-rc2 |
1126 |
if (old_dir != new_dir) |
82d5b9a7c JFS: Add lockdep ... |
1127 1128 |
mutex_lock_nested(&JFS_IP(old_dir)->commit_mutex, COMMIT_MUTEX_SECOND_PARENT); |
1da177e4c Linux-2.6.12-rc2 |
1129 1130 |
if (new_ip) { |
82d5b9a7c JFS: Add lockdep ... |
1131 1132 |
mutex_lock_nested(&JFS_IP(new_ip)->commit_mutex, COMMIT_MUTEX_VICTIM); |
1da177e4c Linux-2.6.12-rc2 |
1133 1134 1135 1136 1137 1138 1139 1140 |
/* * Change existing directory entry to new inode number */ ino = new_ip->i_ino; rc = dtModify(tid, new_dir, &new_dname, &ino, old_ip->i_ino, JFS_RENAME); if (rc) goto out4; |
9a53c3a78 [PATCH] r/o bind ... |
1141 |
drop_nlink(new_ip); |
1da177e4c Linux-2.6.12-rc2 |
1142 |
if (S_ISDIR(new_ip->i_mode)) { |
9a53c3a78 [PATCH] r/o bind ... |
1143 |
drop_nlink(new_ip); |
1da177e4c Linux-2.6.12-rc2 |
1144 |
if (new_ip->i_nlink) { |
48ce8b056 JFS: commit_mutex... |
1145 |
mutex_unlock(&JFS_IP(new_ip)->commit_mutex); |
1da177e4c Linux-2.6.12-rc2 |
1146 |
if (old_dir != new_dir) |
1de87444f JFS: semaphore to... |
1147 |
mutex_unlock(&JFS_IP(old_dir)->commit_mutex); |
48ce8b056 JFS: commit_mutex... |
1148 1149 |
mutex_unlock(&JFS_IP(old_ip)->commit_mutex); mutex_unlock(&JFS_IP(new_dir)->commit_mutex); |
1da177e4c Linux-2.6.12-rc2 |
1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 |
if (!S_ISDIR(old_ip->i_mode) && new_ip) IWRITE_UNLOCK(new_ip); jfs_error(new_ip->i_sb, "jfs_rename: new_ip->i_nlink != 0"); return -EIO; } tblk = tid_to_tblock(tid); tblk->xflag |= COMMIT_DELETE; tblk->u.ip = new_ip; } else if (new_ip->i_nlink == 0) { assert(!test_cflag(COMMIT_Nolink, new_ip)); /* free block resources */ if ((new_size = commitZeroLink(tid, new_ip)) < 0) { txAbort(tid, 1); /* Marks FS Dirty */ |
63f83c9fc JFS: White space ... |
1164 |
rc = new_size; |
1da177e4c Linux-2.6.12-rc2 |
1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 |
goto out4; } tblk = tid_to_tblock(tid); tblk->xflag |= COMMIT_DELETE; tblk->u.ip = new_ip; } else { new_ip->i_ctime = CURRENT_TIME; mark_inode_dirty(new_ip); } } else { /* * Add new directory entry */ rc = dtSearch(new_dir, &new_dname, &ino, &btstack, JFS_CREATE); if (rc) { jfs_err("jfs_rename didn't expect dtSearch to fail " "w/rc = %d", rc); goto out4; } ino = old_ip->i_ino; rc = dtInsert(tid, new_dir, &new_dname, &ino, &btstack); if (rc) { if (rc == -EIO) jfs_err("jfs_rename: dtInsert returned -EIO"); goto out4; } if (S_ISDIR(old_ip->i_mode)) |
d8c76e6f4 [PATCH] r/o bind ... |
1194 |
inc_nlink(new_dir); |
1da177e4c Linux-2.6.12-rc2 |
1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 |
} /* * Remove old directory entry */ ino = old_ip->i_ino; rc = dtDelete(tid, old_dir, &old_dname, &ino, JFS_REMOVE); if (rc) { jfs_err("jfs_rename did not expect dtDelete to return rc = %d", rc); txAbort(tid, 1); /* Marks Filesystem dirty */ goto out4; } if (S_ISDIR(old_ip->i_mode)) { |
9a53c3a78 [PATCH] r/o bind ... |
1209 |
drop_nlink(old_dir); |
1da177e4c Linux-2.6.12-rc2 |
1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 |
if (old_dir != new_dir) { /* * Change inode number of parent for moved directory */ JFS_IP(old_ip)->i_dtroot.header.idotdot = cpu_to_le32(new_dir->i_ino); /* Linelock header of dtree */ tlck = txLock(tid, old_ip, (struct metapage *) &JFS_IP(old_ip)->bxflag, tlckDTREE | tlckBTROOT | tlckRELINK); dtlck = (struct dt_lock *) & tlck->lock; ASSERT(dtlck->index == 0); lv = & dtlck->lv[0]; lv->offset = 0; lv->length = 1; dtlck->index++; } } /* * Update ctime on changed/moved inodes & mark dirty */ old_ip->i_ctime = CURRENT_TIME; mark_inode_dirty(old_ip); new_dir->i_ctime = new_dir->i_mtime = current_fs_time(new_dir->i_sb); mark_inode_dirty(new_dir); /* Build list of inodes modified by this transaction */ ipcount = 0; iplist[ipcount++] = old_ip; if (new_ip) iplist[ipcount++] = new_ip; iplist[ipcount++] = old_dir; if (old_dir != new_dir) { iplist[ipcount++] = new_dir; old_dir->i_ctime = old_dir->i_mtime = CURRENT_TIME; mark_inode_dirty(old_dir); } /* * Incomplete truncate of file data can * result in timing problems unless we synchronously commit the * transaction. */ if (new_size) commit_flag = COMMIT_SYNC; else commit_flag = 0; rc = txCommit(tid, ipcount, iplist, commit_flag); out4: txEnd(tid); |
1da177e4c Linux-2.6.12-rc2 |
1267 |
if (new_ip) |
1de87444f JFS: semaphore to... |
1268 |
mutex_unlock(&JFS_IP(new_ip)->commit_mutex); |
48ce8b056 JFS: commit_mutex... |
1269 1270 1271 1272 |
if (old_dir != new_dir) mutex_unlock(&JFS_IP(old_dir)->commit_mutex); mutex_unlock(&JFS_IP(old_ip)->commit_mutex); mutex_unlock(&JFS_IP(new_dir)->commit_mutex); |
1da177e4c Linux-2.6.12-rc2 |
1273 1274 1275 |
while (new_size && (rc == 0)) { tid = txBegin(new_ip->i_sb, 0); |
1de87444f JFS: semaphore to... |
1276 |
mutex_lock(&JFS_IP(new_ip)->commit_mutex); |
1da177e4c Linux-2.6.12-rc2 |
1277 1278 1279 |
new_size = xtTruncate_pmap(tid, new_ip, new_size); if (new_size < 0) { txAbort(tid, 1); |
63f83c9fc JFS: White space ... |
1280 |
rc = new_size; |
1da177e4c Linux-2.6.12-rc2 |
1281 1282 1283 |
} else rc = txCommit(tid, 1, &new_ip, COMMIT_SYNC); txEnd(tid); |
1de87444f JFS: semaphore to... |
1284 |
mutex_unlock(&JFS_IP(new_ip)->commit_mutex); |
1da177e4c Linux-2.6.12-rc2 |
1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 |
} if (new_ip && (new_ip->i_nlink == 0)) set_cflag(COMMIT_Nolink, new_ip); out3: free_UCSname(&new_dname); out2: free_UCSname(&old_dname); out1: if (new_ip && !S_ISDIR(new_ip->i_mode)) IWRITE_UNLOCK(new_ip); /* * Truncating the directory index table is not guaranteed. It * may need to be done iteratively */ if (test_cflag(COMMIT_Stale, old_dir)) { if (old_dir->i_size > 1) jfs_truncate_nolock(old_dir, 0); clear_cflag(COMMIT_Stale, old_dir); } jfs_info("jfs_rename: returning %d", rc); return rc; } /* |
f720e3ba5 JFS: Whitespace c... |
1312 |
* NAME: jfs_mknod |
1da177e4c Linux-2.6.12-rc2 |
1313 |
* |
f720e3ba5 JFS: Whitespace c... |
1314 |
* FUNCTION: Create a special file (device) |
1da177e4c Linux-2.6.12-rc2 |
1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 |
*/ static int jfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev) { struct jfs_inode_info *jfs_ip; struct btstack btstack; struct component_name dname; ino_t ino; struct inode *ip; struct inode *iplist[2]; int rc; tid_t tid; struct tblock *tblk; if (!new_valid_dev(rdev)) return -EINVAL; jfs_info("jfs_mknod: %s", dentry->d_name.name); if ((rc = get_UCSname(&dname, dentry))) goto out; ip = ialloc(dir, mode); |
087387f90 [PATCH] JFS: retu... |
1338 1339 |
if (IS_ERR(ip)) { rc = PTR_ERR(ip); |
1da177e4c Linux-2.6.12-rc2 |
1340 1341 1342 1343 1344 |
goto out1; } jfs_ip = JFS_IP(ip); tid = txBegin(dir->i_sb, 0); |
82d5b9a7c JFS: Add lockdep ... |
1345 1346 |
mutex_lock_nested(&JFS_IP(dir)->commit_mutex, COMMIT_MUTEX_PARENT); mutex_lock_nested(&JFS_IP(ip)->commit_mutex, COMMIT_MUTEX_CHILD); |
1da177e4c Linux-2.6.12-rc2 |
1347 |
|
4f4b401bf JFS: allow extend... |
1348 1349 |
rc = jfs_init_acl(tid, ip, dir); if (rc) |
1da177e4c Linux-2.6.12-rc2 |
1350 |
goto out3; |
1d15b10f9 JFS: Implement jf... |
1351 1352 1353 1354 1355 |
rc = jfs_init_security(tid, ip, dir); if (rc) { txAbort(tid, 0); goto out3; } |
4f4b401bf JFS: allow extend... |
1356 1357 1358 1359 |
if ((rc = dtSearch(dir, &dname, &ino, &btstack, JFS_CREATE))) { txAbort(tid, 0); goto out3; } |
1da177e4c Linux-2.6.12-rc2 |
1360 1361 1362 1363 1364 1365 |
tblk = tid_to_tblock(tid); tblk->xflag |= COMMIT_CREATE; tblk->ino = ip->i_ino; tblk->u.ixpxd = JFS_IP(ip)->ixpxd; ino = ip->i_ino; |
4f4b401bf JFS: allow extend... |
1366 1367 |
if ((rc = dtInsert(tid, dir, &dname, &ino, &btstack))) { txAbort(tid, 0); |
1da177e4c Linux-2.6.12-rc2 |
1368 |
goto out3; |
4f4b401bf JFS: allow extend... |
1369 |
} |
1da177e4c Linux-2.6.12-rc2 |
1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 |
ip->i_op = &jfs_file_inode_operations; jfs_ip->dev = new_encode_dev(rdev); init_special_inode(ip, ip->i_mode, rdev); insert_inode_hash(ip); mark_inode_dirty(ip); dir->i_ctime = dir->i_mtime = CURRENT_TIME; mark_inode_dirty(dir); iplist[0] = dir; iplist[1] = ip; rc = txCommit(tid, 2, iplist, 0); out3: txEnd(tid); |
1de87444f JFS: semaphore to... |
1388 1389 |
mutex_unlock(&JFS_IP(ip)->commit_mutex); mutex_unlock(&JFS_IP(dir)->commit_mutex); |
1da177e4c Linux-2.6.12-rc2 |
1390 |
if (rc) { |
4f4b401bf JFS: allow extend... |
1391 |
free_ea_wmap(ip); |
1da177e4c Linux-2.6.12-rc2 |
1392 1393 1394 1395 1396 1397 1398 |
ip->i_nlink = 0; iput(ip); } else d_instantiate(dentry, ip); out1: free_UCSname(&dname); |
1da177e4c Linux-2.6.12-rc2 |
1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 |
out: jfs_info("jfs_mknod: returning %d", rc); return rc; } static struct dentry *jfs_lookup(struct inode *dip, struct dentry *dentry, struct nameidata *nd) { struct btstack btstack; ino_t inum; struct inode *ip; struct component_name key; const char *name = dentry->d_name.name; int len = dentry->d_name.len; int rc; jfs_info("jfs_lookup: name = %s", name); |
686762c80 JFS: Initialize d... |
1415 1416 |
if (JFS_SBI(dip->i_sb)->mntflag & JFS_OS2) dentry->d_op = &jfs_ci_dentry_operations; |
1da177e4c Linux-2.6.12-rc2 |
1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 |
if ((name[0] == '.') && (len == 1)) inum = dip->i_ino; else if (strcmp(name, "..") == 0) inum = PARENT(dip); else { if ((rc = get_UCSname(&key, dentry))) return ERR_PTR(rc); rc = dtSearch(dip, &key, &inum, &btstack, JFS_LOOKUP); free_UCSname(&key); if (rc == -ENOENT) { d_add(dentry, NULL); return ERR_PTR(0); } else if (rc) { jfs_err("jfs_lookup: dtSearch returned %d", rc); return ERR_PTR(rc); } } ip = iget(dip->i_sb, inum); if (ip == NULL || is_bad_inode(ip)) { jfs_err("jfs_lookup: iget failed on inum %d", (uint) inum); if (ip) iput(ip); return ERR_PTR(-EACCES); } |
1da177e4c Linux-2.6.12-rc2 |
1443 1444 1445 1446 1447 1448 1449 |
dentry = d_splice_alias(ip, dentry); if (dentry && (JFS_SBI(dip->i_sb)->mntflag & JFS_OS2)) dentry->d_op = &jfs_ci_dentry_operations; return dentry; } |
5ca296073 knfsd: exportfs: ... |
1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 |
struct dentry *jfs_get_dentry(struct super_block *sb, void *vobjp) { __u32 *objp = vobjp; unsigned long ino = objp[0]; __u32 generation = objp[1]; struct inode *inode; struct dentry *result; if (ino == 0) return ERR_PTR(-ESTALE); inode = iget(sb, ino); if (inode == NULL) return ERR_PTR(-ENOMEM); if (is_bad_inode(inode) || (generation && inode->i_generation != generation)) { result = ERR_PTR(-ESTALE); goto out_iput; } result = d_alloc_anon(inode); if (!result) { result = ERR_PTR(-ENOMEM); goto out_iput; } return result; out_iput: iput(inode); return result; } |
1da177e4c Linux-2.6.12-rc2 |
1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 |
struct dentry *jfs_get_parent(struct dentry *dentry) { struct super_block *sb = dentry->d_inode->i_sb; struct dentry *parent = ERR_PTR(-ENOENT); struct inode *inode; unsigned long parent_ino; parent_ino = le32_to_cpu(JFS_IP(dentry->d_inode)->i_dtroot.header.idotdot); inode = iget(sb, parent_ino); if (inode) { if (is_bad_inode(inode)) { iput(inode); parent = ERR_PTR(-EACCES); } else { parent = d_alloc_anon(inode); if (!parent) { parent = ERR_PTR(-ENOMEM); iput(inode); } } } return parent; } |
92e1d5be9 [PATCH] mark stru... |
1506 |
const struct inode_operations jfs_dir_inode_operations = { |
1da177e4c Linux-2.6.12-rc2 |
1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 |
.create = jfs_create, .lookup = jfs_lookup, .link = jfs_link, .unlink = jfs_unlink, .symlink = jfs_symlink, .mkdir = jfs_mkdir, .rmdir = jfs_rmdir, .mknod = jfs_mknod, .rename = jfs_rename, .setxattr = jfs_setxattr, .getxattr = jfs_getxattr, .listxattr = jfs_listxattr, .removexattr = jfs_removexattr, #ifdef CONFIG_JFS_POSIX_ACL .setattr = jfs_setattr, .permission = jfs_permission, #endif }; |
4b6f5d20b [PATCH] Make most... |
1525 |
const struct file_operations jfs_dir_operations = { |
1da177e4c Linux-2.6.12-rc2 |
1526 1527 1528 |
.read = generic_read_dir, .readdir = jfs_readdir, .fsync = jfs_fsync, |
fa3241d24 JFS: ext2 inode a... |
1529 |
.ioctl = jfs_ioctl, |
1da177e4c Linux-2.6.12-rc2 |
1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 |
}; static int jfs_ci_hash(struct dentry *dir, struct qstr *this) { unsigned long hash; int i; hash = init_name_hash(); for (i=0; i < this->len; i++) hash = partial_name_hash(tolower(this->name[i]), hash); this->hash = end_name_hash(hash); return 0; } static int jfs_ci_compare(struct dentry *dir, struct qstr *a, struct qstr *b) { int i, result = 1; if (a->len != b->len) goto out; for (i=0; i < a->len; i++) { if (tolower(a->name[i]) != tolower(b->name[i])) goto out; } result = 0; /* * We want creates to preserve case. A negative dentry, a, that * has a different case than b may cause a new entry to be created * with the wrong case. Since we can't tell if a comes from a negative * dentry, we blindly replace it with b. This should be harmless if * a is not a negative dentry. */ memcpy((unsigned char *)a->name, b->name, a->len); out: return result; } struct dentry_operations jfs_ci_dentry_operations = { .d_hash = jfs_ci_hash, .d_compare = jfs_ci_compare, }; |